JP2003088488A - Dish washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water from being spattered to the surrounding by surely stopping jetting of the water when a washing cabinet is drawn out. SOLUTION: In order to fix at latch operation an operation lever for latching so as to prevent drawing out of the washing cabinet, a locking device operating by a solenoid is provided and the locking device is provided with a micro switch 44 for detecting locking and unlocking state. According to the ON/OFF of the switch 44, a relay 58 operates to close a make-and-break contact 582 inserted to the power supplying line of a washing pump motor 141a for conducting when the operation lever is locked and to cut of the power supplying line when the operation lever is unlocked. Thus, even when the washing cabinet is drawn out during washing operation, the washing pump motor 141a is stopped surely before the drawing operation and the rotating operation of the operation lever, thereby the water is surely prevented from jetting.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a dishwasher,
Particularly, the present invention relates to a dishwasher suitable for a built-in type to be incorporated in a system kitchen.

[0002]

2. Description of the Related Art Generally, a domestic dishwasher introduces tap water into a washing cabinet and stores it at the bottom thereof, and then operates a pump to suck the stored water and feed it to a nozzle.
It has a configuration in which water is vigorously jetted from a nozzle to wash the dishes stored in the washing cabinet. In the conventional dishwasher of this type, a washing cabinet is disposed inside the housing, and a door that rotates downward is provided on the front surface of the housing. It has a structure that pulls out horizontally.

In recent years, with the spread of system kitchens in ordinary households, built-in type dishwashers to be incorporated into system kitchens are commercially available. As a dishwasher suitable for a built-in type, JP-A-2000-139
Those described in Japanese Patent Publication No. 799, etc. are known. That is, this type of dishwasher is a so-called drawer type dishwasher, and a washing cabinet containing a dish basket for storing dishes is configured so that it can be pulled out forward together with a door that also serves as a front panel. When the washing cabinet is pulled out, the upper surface of the washing cabinet is wide open so that dishes can be put in and taken out from above, and when the washing cabinet is pushed into the case, the top lid was waiting in the upper space inside the case. Has a structure in which it lowers and closes the upper opening of the washing cabinet.

[0004]

Not only in such a drawer-type dishwasher, but also in a conventional dishwasher which opens the door by rotating it toward you, the dishwasher may be temporarily stopped during the washing operation. You may want to take in and out of.
Therefore, the conventional dishwasher is provided with a door switch for detecting the opening and closing of the door, and when the door is opened, the power supply line that supplies the driving power to the pump motor is disconnected in conjunction with the operation of the door. Accordingly, there is known one that performs control so as to stop the pump operation. However, when the door is opened vigorously, the jet of water from the nozzle is not completely stopped at that point, the water jumps out of the washing cabinet and wets the surroundings, and the water becomes hot. If it is, there is a risk that the user may get burned.

Therefore, when the operation temporary stop key is pressed during the cleaning operation, the microcomputer receiving the key operation signal sends a cutoff signal to the drive circuit of the pump motor,
In some cases, control for stopping the operation of the motor is also used. However, since such pump motors are stopped through gate-controlled semiconductor switches such as bidirectional three-terminal thyristors, if these switches remain conductive due to a failure, the pump motor will not stop and the door will Water may gush out when opened.

The present invention has been made to solve the above problems, and its main purpose is to spray water from a nozzle even when dishes are taken in and out during washing and rinsing operation. It is to provide a dishwasher that can reliably prevent water from splashing out.

[0007]

Means for Solving the Problems and Effects According to the first invention made to solve the above problems, a washing cabinet capable of accommodating tableware is provided in the casing, and the washing cabinet is provided in the washing cabinet. In the dishwasher in which dishware is stored in the washing cabinet with the opening facing the outside of the housing, and water is sprayed into the washing cabinet with the opening closed to perform washing, a) Locking means for prohibiting the opening of the washing cabinet with the opening closed, b) a pump motor for pumping water for the washing, and c) a power supply line to the motor. An opening / closing control unit including an opening / closing contact, and opening / closing control unit for closing or opening the opening / closing contact in association with the locking and unlocking operations by the locking unit.

The term "locking" as used herein means to be carried out by some kind of active and mechanical operation on the side of the dishwasher, and as a result, the same active and mechanical operation is not performed. That is, the opening of the washing cabinet cannot be opened only by a simple manual operation by the user.

In the dishwasher according to the first aspect of the present invention, when the opening of the washing cabinet is closed and the opening of the opening is prohibited by the locking means, the opening / closing contact is closed, so that the pump motor is powered. Can be supplied, and by operating the pump motor in this state, water is sprayed into the washing cabinet to wash dishes. If the user wants to open the opening of the washing cabinet in order to put in and take out dishes, for example, during the washing, it is necessary to first unlock the lock by the locking means. For example, when the locking means releases the lock in response to the operation of the operation pause key or the operation of the lock release instruction key, the opening / closing contact is opened by the opening / closing control means in association with the releasing operation, and the pump motor is connected. The power supply line is cut off. Therefore, even if the driving power to the pump motor is supplied and water is being injected just before that, the water injection is reliably stopped by the interruption of the power supply, and the user Water does not squirt when the opening of the washing cabinet is opened.

As described above, according to the dishwasher of the first invention, it is possible to reliably prevent the water from spouting out of the washing cabinet to wet the surroundings or splash on the user.

As an aspect of the dishwasher according to the first aspect of the present invention, the locking means includes a1) an operating lever operated by a user and a movable engaging means which moves in association with the operation of the operating lever. Latching means for preventing the opening of the opening by engagement between the movable engaging means and a housing or an engaging portion provided on the housing side, and a2) by preventing movement of the movable engaging means, Lock means that cannot release the restraint of the opening opening by the latch means, and the opening / closing control means is configured to close or open the opening / closing contact in conjunction with the locking and unlocking operation by the locking means. You can

That is, in this structure, the locking means blocks the movement of the movable engaging means by the active and mechanical operation. According to such a configuration, in order to allow the user to open the opening of the washing cabinet during the washing operation, first, for example, the operation temporary stop key is pressed or the lock is performed in order to execute the unlocking operation by the opening / closing control means. It is necessary to perform a procedure of pressing the release key, and then operating the operation lever of the latch means to release the engagement by the movable engagement means and then opening the washing cabinet. As a result, it can be expected that it will take some time between the lock being released, that is, the power supply to the pump motor being cut off and the opening of the washing cabinet being actually opened. Even if there is a slight time delay from the time when the water is shut off until the water jet is completely settled, the water jet can be surely stopped when the opening of the washing cabinet is opened.

More specifically, the locking means includes a locking portion that moves between two positions to prevent movement of the movable engaging means, and the opening / closing control means includes the locking portion. A switch for lock detection which is opened / closed depending on the position of (1) and a relay which opens / closes the opening / closing contact according to the opening / closing of the switch.

According to this structure, since the power supply line is electrically connected / disconnected by mechanically opening / closing the opening / closing contact of the relay, an electric power using a gate control type semiconductor switch such as a bidirectional three-terminal thyristor is used. Reliability is higher than that of static switching, and it is possible to reduce the risk of a failure such that the device remains in a conductive state.

The dishwasher according to the first invention is particularly suitable for a so-called drawer type dishwasher. That is, the front surface of the housing is open, the washing cabinet can be pulled forward from the housing, and has an opening for loading and unloading tableware on the upper surface thereof. An upper lid for closing, wherein the latch means stops the withdrawal of the washing cabinet by the engagement of the movable engaging means and the housing or an engaging portion provided on the housing side, and the locking means is By blocking the movement of the movable engaging means, the operation of stopping the drawer of the washing cabinet by the latch means cannot be released.

The dishwasher having such a structure is often incorporated in the system kitchen, and is installed in the range from the feet of general adults to the height of the waist even if it is high, so that even a small child can handle it sufficiently. Is often in a position where Therefore, it is easy for a child to mischief, and with the above configuration, high safety against such mischief can be achieved.

A second aspect of the present invention, which has been made to solve the above-mentioned problems, has a housing having an opening on the front surface and a washing cabinet which can be pulled out from the housing to the front and has an opening for storing and taking out dishes on the upper surface. And an upper lid that is vertically movable in the housing and closes an upper surface opening of the cleaning cabinet in a lowered position,
A dishwasher comprising: an upper lid drive means for moving the upper lid up and down; a first engaging portion is provided in the washing cabinet, a second engaging portion is provided in the upper lid, and the first engaging portion is provided when the upper lid is in a raised position. The mating portion and the second engaging portion do not interfere with each other, the cleaning cabinet is housed in the housing, and the first engaging portion and the second engaging portion are moved when the upper lid is moved down to the lowered position by the upper lid driving means. It is characterized in that the lock is performed so as to prevent the withdrawal of the washing chamber by the engagement with the engaging portion.

That is, in the dishwasher according to the second aspect of the present invention, after the washing cabinet is housed in the housing with the upper lid in the raised position, the upper lid is lowered by the upper lid driving means to close the upper opening, At the same time, the second engaging portion and the first engaging portion are engaged with each other to prevent the washing cabinet from being pulled out forward. Therefore, for example, during a washing operation, when the upper lid closes the upper opening of the washing cabinet, the user cannot pull out the washing cabinet forward, and water spouts from the washing cabinet to wet the surroundings. It is possible to prevent the user from loosening and hanging on the user.

As an aspect of the second aspect of the present invention, the washing cabinet is provided with a latch means including an operation lever operated by a user and a movable engagement means which moves in association with the operation of the operation lever. , The movable engaging means is engaged with the housing or an engaging portion provided on the housing side so as to stop the withdrawal of the washing cabinet, and at least a part of the latch means is the first engaging means. The movable engaging means can be prevented from moving by engaging with the second engaging portion.

In this structure, the user pushes the washing cabinet into the housing and then operates the operation lever to fix the accommodation position of the washing cabinet. In this state, the user can pull out the washing cabinet by operating the operation lever in the opposite direction. For example, when the user starts the operation by operating the operation start key, the upper lid drive means lowers the upper lid and closes the upper opening of the washing cabinet, and at the same time, the first engaging portion and the second engaging portion are closed. The engagement makes it impossible to draw out the washing cabinet.

Therefore, according to this configuration, when the washing operation is temporarily stopped and the washing cabinet is to be pulled out, at least the temporary stop key is pressed → the operating lever is operated to release the latch → the handle is gripped. 3 such as opening the door
Since the stepwise operation is required, it is possible to secure the time until the washing cabinet is pulled out and to reliably stop the water injection. Further, by setting the state in which the drawer of the washing cabinet is stopped by the operation of the operation lever, it is advantageous to prevent a child from pulling out the washing cabinet by mischief. Further, since the movement of the movable engaging means is blocked by utilizing the vertical movement of the upper lid, it is not necessary to separately provide a lock mechanism for such blocking, which is also advantageous in cost reduction.

The upper lid driving means may move the upper lid up and down by the driving force of a motor. According to this, the upper lid can be moved up and down without applying a force by the user, and the upper opening of the washing cabinet can be closed with high water tightness.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dishwasher according to an embodiment of the first invention (hereinafter referred to as "embodiment 1") will be described below with reference to the drawings. First, the overall configuration of the dishwasher of this embodiment will be described with reference to FIGS. 1 and 2. 1 and 2 are schematic vertical cross-sectional views showing the overall configuration of the dishwasher, FIG. 1 shows a state where the washing cabinet is completely housed in the housing, and FIG. 2 shows a state where the washing cabinet is being pulled out from the housing. is there.

A washing cabinet 2 having an upper surface opening 3 is disposed inside a housing 1 having an open front surface, and a dish basket 4 for arranging dishes in a line is installed in the washing cabinet 2. There is. An upper lid 5 for closing the upper surface opening 3 of the washing cabinet 2 is arranged in an upper space in the housing 1 so as to be vertically movable by a pair of left and right parallel link mechanisms including a pair of front and rear links 6. A front panel 7 that doubles as a door that closes the front opening of the casing 1 is detachably attached to the front wall 2a of the washing cabinet 2, and the front panel 7 and the washing cabinet 2 are integrated into the casing 1. It can be pulled out forward along the guide rails 8 which are installed substantially horizontally inside the both side walls.

The upper portion of the front panel 7 has an inclined surface portion 7a protruding like an eaves, and an inwardly depressed handle portion 9 is formed on the lower side of the inclined surface portion 7a. A rotatable operation lever 31 is provided. The rotational movement of the operation lever 31 in the left-right direction is interlocked with a latch lever 33 having an engaging piece protruding upward between the front wall 2a of the washing cabinet 2 and the front panel 7, and the operation lever operated by the user. Interlocking with the operation of 31, it is possible to block (that is, latch) the pulling-out operation of the cleaning cabinet 2 or release the blocking.

As will be described in detail later, in this dishwasher,
The upper lid 5 moves up and down in conjunction with the operation of the operation lever 31, and the upper opening 3 of the washing cabinet 2 is opened and closed.
That is, as shown in FIG. 1, when the operating lever 31 is rotated from the unlatched position to the latched position in the state where the cleaning cabinet 2 is completely housed in the housing 1, the latch lever 33 rotates to clean. The cabinet 2 is locked in a state in which it cannot be pulled out, and the upper lid 5 descends to come into close contact with the upper surface of the cleaning cabinet 2 to close the upper surface opening 3. On the other hand, the user operates the operation lever 31
When is rotated to the latch release position, the upper lid 5 rises as shown in FIG. 2 so that it does not come into contact with the upper surface opening 3 of the washing cabinet 2, and the above-mentioned locking by the latch lever 33 is released. The cabinet 2 can be freely pulled out from the inside of the housing 1.

An extendable water supply hose 10 equipped with a water supply valve (not shown) is connected to the rear of the cleaning cabinet 2.
As shown in FIG. 1, when the cleaning cabinet 2 is completely housed in the housing 1, the water supply valve is opened and the water is supplied from the external water tap or the like during the cleaning operation and the rinsing operation. It is poured into the washing cabinet 2 through 10. A large recessed water storage tank 11 is arranged in communication with the front bottom surface of the cleaning cabinet 2, and the water poured into the cleaning cabinet 2 flows into the water storage tank 11 and is stored therein. On the upper part of the water storage tank 11, a mesh-shaped filter 12 is detachably provided for collecting the food residues that run down from the dishes when washing the dishes.
A rotatable nozzle arm 13 having a plurality of water ejection holes formed on the upper surface is provided at the center of the bottom of the cleaning cabinet 2, and a cleaning / drainage pump 14 is disposed below the bottom surface of the cleaning cabinet 2. The cleaning / drainage pump 14 includes a motor that can be rotationally driven in both rotation directions. When the motor rotates in the normal direction, the cleaning / drainage pump 14 functions as a cleaning pump, and when it rotates in the reverse direction, it functions as a drainage pump. To do.

The washing cabinet 2 including the water storage tank 11 as described above.
The water collected at the bottom of the cleaning unit 2 is appropriately heated by the heater 15 arranged at the bottom of the cleaning cabinet 2. When the cleaning / drainage pump 14 is driven as a cleaning pump in this state, the hot water sucked from the water storage tank 11 is pressure-fed to the nozzle arm 13 and sprayed into the cleaning chamber 2 through the water ejection holes. The nozzle arm 13 is rotated by the momentum of this injection. As a result, the tableware stored in the tableware basket 4 is sprayed with water and the dirt is removed. The food residue attached to the tableware is collected by the filter 12, and the water flows into the water storage tank 11 and is circulated again for use.

Although illustration is omitted because the figure becomes complicated, a ventilation means including a ventilation fan and an exhaust means are provided between the front wall 2a of the washing cabinet 2 and the front panel 7. When the washing operation as described above is completed, the operation shifts to the drying operation, the outside air is supplied to the inside of the washing cabinet 2 by the air blower, the outside air is heated by the heater 15 and hits the dishes, and the air containing the steam generated from the dishes is discharged. It is designed to be discharged outside the machine by means.

Next, in the dishwasher of the first embodiment, the latch device 3 for prohibiting the withdrawal of the washing cabinet 2 is carried out.
0 and the lock device 40 will be described with reference to FIGS. 6 to 9. Here, the latch device 30, which is one form of the latch means, includes the operation lever 31 and the latch lever 33, which is one form of the movable engagement means, and the lock device 40, which is one form of the lock means, operates the lock lever 40. This is for preventing the release of the latch due to the rotation of the lever 31.

FIG. 6 and FIG. 7 are both a top view of the main part showing the latch mechanism in the present dishwasher, and FIG. 8 is a side sectional view of the same part. 6 to 8, only the outer frame of the locking device 40 is shown in order to avoid complication.
The main part of the latch device 30 is the operation lever 3
1, a mounting plate 32, a latch lever 33, a hinge lever 34, a latch spring 35, a hinge spring 36, and the like.

As described above, the front end portion of the operation lever 31 projects from the front panel 7 to the outside of the machine, and the other end is fixed to the mounting plate 32 so as to be rotatable about the vertical shaft 321. The operation lever 31 and the latch lever 33 are the fixed shaft 3
It is fixed at 11, and both are integrally rotatable around the shaft 321. The latch lever 33 has an L-shaped upright engagement piece 331, and the engagement piece 331 projects upward from an opening 2c opened in the upper portion 2b of the front edge of the cleaning cabinet 2.
The operation lever 31 has a hanging piece 312 extending downward,
A latching spring 35 is stretched between the hanging piece 312 and the spring fixing piece 322 which is bent and extends downward from the mounting plate 32. By the pulling force of the latch spring 35, the operating lever 31 is urged in a direction from the center of the rotatable range toward both ends. With the above configuration, the engaging piece 331 of the latch lever 33 is attached to the shaft 32 in accordance with the turning operation of the operating lever 31 to the left and right as shown in FIG.
Rotate around 1.

The hinge lever 34 is rotatably mounted on the mounting plate 32 about a horizontal shaft 341, and a hinge spring 36, which is a torsion coil spring, causes the contact piece 342 to stand upright (in FIG. It is urged in the direction of rotation. An opening 2e is provided in a standing wall 2d, which is a part of a wall surface forming the cleaning cabinet 2, which is located behind the contact piece 342 of the hinge lever 34, while the cleaning cabinet 2 is housed in the housing 1. The front frame 1a attached to the front surface of the housing 1 that faces the standing wall 2d when the front wall 2d is provided with a pin 1b projecting forward. When the washing cabinet 2 is completely housed in the housing 1, the pin 1b is inserted into the opening 2e and presses the contact piece 342 of the hinge lever 34.

The latch device 30 having the above structure operates as follows. When the cleaning cabinet 2 is in the state of being pulled out from the housing 1 as shown in FIG. 2, the contact piece 342 of the hinge lever 34 is in contact.
Is not pushed by the pin 1b, but is urged by the hinge spring 36 so that the contact piece 342 stands up. When the contact piece 342 is in the upright state, the locking piece 343 at the lower end of the hinge lever 34 is in contact with the latch lever 33 at the position L3 shown in FIG.
From turning to the latch position L2.
As a result, when the washing cabinet 2 is pulled out, even if the user tries to turn the operation lever 31 toward the latch position L2, it cannot be turned, and an undesired latch operation can be prevented.

When the user pushes the cleaning cabinet 2 into the housing 1 from the state where the cleaning cabinet 2 is pulled out, the latch lever 33
The engaging piece 331 is within the width of the latch hole 1c opened in the front frame 1a of the housing 1 (range d shown in FIG. 7), so that the engaging piece 331 enters the latch hole 1c. . When the washing cabinet 2 is completely stored in the housing 1 as shown in FIG. 1, the engaging piece 331 is in a position where a part of the engaging piece 331 has entered the latch hole 1c as shown in FIG. At this time, the contact piece 342 of the hinge lever 34 is pushed by the pin 1b,
The hinge lever 34 rotates around the shaft 341 against the urging force of the hinge spring 36, and the locking piece 343 at the lower end is disengaged from the position where the latch lever 33 can be locked. This allows
When the washing cabinet 2 is stored in the housing 1, the user can rotate the operation lever 31 to the latch position.

When the user rotates the operation lever 31 to the latch position (position L2 in FIG. 6), the latch lever 33
The engaging piece 331 goes around behind the bent edge portion 1d of the latch hole 1c of the front frame 1a, and the engaging piece 331 does not come off from the latch hole 1c. This allows the front panel 7
(And the washing cabinet 2) is latched in the open prohibition state, and unless the latch is released, the washing cabinet 2 cannot be pulled out forward. That is, here, the latch hole 1c functions as an engaging portion provided on the housing side.

FIG. 9 is a top view of essential parts showing a lock mechanism in the present dishwasher. The lock device 40 includes a solenoid 42, a heart cam type drive mechanism 43, a micro switch 44, and the like, which are attached to predetermined positions inside the case 41, respectively. When the solenoid 42 is energized from the outside, the plunger 421 is operated only during the energization period.
Is pulled in, and when the energization stops, the pulling in is released. The heart-cam type drive mechanism 43 is connected to the plunger 421, and every time the plunger 421 is pulled once, the lock shaft 431 is alternately advanced and retracted between the position L4 and the position L5. When the lock shaft 431 is in the position L4, the lock shaft 4
Reference numeral 31 does not interfere with the hanging piece 312 in the rotation range of the operation lever 31. Therefore, the operation lever 31 can freely rotate. On the other hand, when the lock shaft 431 is advanced to the position L5 when the operation lever 31 is in the latched position L2, the lock shaft 431 interferes with the hanging piece 312 of the operation lever 31 and rotates the operation lever 31 in the latch release direction. Even if an attempt is made, the hanging piece 312 comes into contact with the lock shaft 431 and the rotation is blocked. In this way, by energizing the solenoid 42 from the outside for a short time, the rotation of the operation lever 31 can be blocked and released. That is, here, the lock shaft 431 functions as a locking portion of the locking means.

The micro switch 44 for lock detection is
The solenoid 42 and the drive mechanism 43 are arranged on a substantially straight line so that the movable element 441 is pushed when the lock shaft 431 advances to the position L5. Therefore,
Whether the lock shaft 431 is at the position L4 or the position L5, that is, whether the operation lever 31 is locked or not can be detected by the conduction or non-conduction of the micro switch 44. The lock detection signal from the micro switch 44 is used for controlling the motor described later.

Next, the opening / closing drive mechanism of the upper lid 5 associated with the operation of the latch device 30 will be described with reference to FIGS. 3 and 4 are side structural views of the main part centering on the opening / closing drive mechanism of the upper lid 5, and FIG.
Is completely stored in the housing 1, and FIG. 4 is a state in which the cleaning cabinet 2 is being pulled out from the housing 1. FIG. 5 is a front view of the main part centering on the opening / closing drive mechanism of the upper lid 5.

One link 6 constituting a parallel link mechanism
Is a substantially L-shaped plate-like member, the front end of the short piece of which is pivotally mounted on the side surface of the upper lid 5 so as to be slidable forward and backward, and the rear end of the short piece, that is, the L-shaped member. The central portion is pivotally attached to the inner surface of the side wall 1e of the housing 1. Further, the lower ends of the two front and rear links 6 are operating plates 20 that extend substantially horizontally.
Are axially attached to both ends. Link 6 on the rear side
Is connected to one end of a coil spring 21 installed substantially horizontally, and the other end of the coil spring 21 is connected to the side wall 1 of the housing 1.
e Fixed to the inner surface. The coil spring 21 urges the link 6 to rotate in the clockwise direction in FIG. 3 about the shaft 6a, so that the upper lid 5 is lifted when no external force is applied.

A coil spring 22 is provided at the front end of the operating plate 20.
One end of the wire rope 23 is fixed by inserting.
The wire rope 23 is slidably inserted in the tube 24, and one end 24a of the tube 24 is fixed to the inner surface of the side wall 1e of the housing 1 on the rear side of the connection point between the operating plate 20 and the wire rope 23. Has been done. The tube 24 extends rearward from the connection portion and draws a large arc to be disposed downward, and is sent forward along a guide groove 25 formed substantially horizontally on the outer side surface of the side wall of the cleaning cabinet 2, Further, it is led to a gap between the front panel 7 and the front wall 2a of the washing cabinet 2.

On the other hand, as shown in FIG.
A hanging stretched piece 314 is fixed to the stretched piece 314.
Is rotatable about a shaft 261 coaxial with the shaft 321 within a predetermined range with respect to the mounting member 26 fixed to the front panel 7. Tubes 24, 24 'arranged on both sides
The other ends 24b and 24b 'of the wire ropes 23 and 23' are fixed to the attachment member 26, and the ends of the wire ropes 23 and 23 'are connected to the extension piece 31.
It is fixed to 4. Therefore, when the operating lever 31 is in the latched position, both wire ropes 23, 23 'are similarly pulled by the extending piece 314 that rotates integrally with the operating lever 31, and the operating lever 31 is returned to the unlatched position. The pulling of the wire ropes 23, 23 'is released.

When the operation lever 31 is rotated to the latched position and the wire rope 23 is pulled as described above, the operating plate 20 is pulled rearward against the compression biasing force of the coil spring 21. The extending pieces 314 are the left and right wire ropes 23, 2.
Since 3'is pulled by the same length at the same time, the left and right actuating plates 20 move rearward in the same manner, whereby the upper lid 5 descends almost vertically and closes the upper opening 3 of the washing cabinet 2. . Even when there is an imbalance due to an imbalance in the operation of the parallel link mechanisms on the left and right sides due to an unbalance of the assembly process and parts, a coil spring inserted between the wire rope 23 and the operating plate 20. The imbalance is corrected by the action of 22, and after the entire upper lid 5 closes the upper surface opening 3 of the washing chamber 2, a pressing force acts almost uniformly on the whole. As a result, it is possible to achieve a high water-sealing property over the entire circumference at the contact portion between the upper lid 5 and the upper edge of the cleaning cabinet 2.

When the operating lever 31 is rotated from the latched position to the unlatched position, the pulling of the left and right wire ropes 23, 23 'is released as described above. Then, the operating plate 20 moves forward due to the compressive force of the coil spring 21. As a result, the upper lid 5 rises almost vertically, and the upper surface opening 3 of the cleaning cabinet 2 is opened.

As described above, in the present dishwasher, the drawer 2 can be prevented from being pulled out or released according to the turning operation of the operation lever 31 by the user, and at the same time, the upper lid 5 can be closed or opened. You can

In the above embodiment, the drive mechanism 43 for moving the lock shaft 431 according to the drive of the solenoid 42.
Although a mechanism using a heart cam is adopted as, a structure other than that may be used. Specifically, for example, a double knock type mechanism may be used.

FIG. 10 is a block diagram of the control system of the main part of the present dishwasher. The commercial AC power supply 51 connected via a power outlet or the like outside the machine includes one terminal of a power switch 52, a pump motor 141, a solenoid drive unit 59,
It is connected to the primary winding of the transformer TR. The secondary winding of the transformer TR is connected to the power supply circuit 54,
The power supply circuit 54 outputs a DC voltage Vd of, for example, + 5V, which is necessary for an electric circuit system. The other terminal of the power switch 52 is connected to one terminal of the door switch 53, and the heater 15 and the blower motor 1 are connected to the other terminal of the door switch 53.
6 and the water supply valve 101 are connected. Therefore, the commercial AC power supply 51 is connected to the heater 15, the blower motor 16, and the water supply valve 101 only when both the power switch 52 and the door switch 53 are turned on.

The control unit 50 is mainly composed of a microcomputer including a CPU, a ROM, a RAM, a timer, etc., is driven by a direct current supplied from a power supply circuit 54, and is based on a control program stored in the ROM. And executes various controls such as driving operation. Control unit 50
Is connected to a plurality of gate control type semiconductor switches including gate control type semiconductor switches 55 and 56, and by applying a control voltage to each of these,
Heater 15, blower motor 16, water supply valve 101, washing pump motor 141a, and drainage pump motor 141b
ON / OFF control is performed (the pump motor 141 is referred to as a wash pump motor 141a and a drain pump motor 141b when it functions as a wash pump and a drain pump).

One of the features of the dishwasher of the present embodiment is that, in the above-mentioned configuration, the relay 58 is opened / closed in addition to the gate-controlled semiconductor switch 55 in the middle of the power supply line for supplying the driving power to the washing pump motor 141a. A contact 582 is inserted, and a current is supplied / interrupted from the relay drive unit 57 to the solenoid 581 that controls the opening / closing of the opening / closing contact 582 according to ON / OFF of the micro switch 44 for lock detection. It has become so. That is,
The open / close contact 582 of the relay 58 contacts only when the micro switch 44 is in the ON state, and the cleaning pump motor 1
When the drive current can be supplied to 41a and the micro switch 44 is off, the open / close contact 582 of the relay 58 is opened, and even if the gate control type semiconductor switch 55 is in the conductive state, The power supply to the cleaning pump motor 141a is intentionally shut off.

In FIG. 10, components such as an on / off detection circuit for detecting the open / closed state of the power switch 52 and the door switch 53 are omitted.

In this dishwasher, the user stores the dishes in the washing cabinet 2, pushes the washing cabinet 2 into the casing 1, and rotates the operation lever 31 to the latch position as described above.
After that, when the start of the cleaning operation is instructed by, for example, operating the operation start key, the control unit 50 applies a drive current to the solenoid 42 for a short time through the solenoid drive unit 59,
Lock so that the latch cannot be released. When the lock is applied, the open / close contact 582 of the relay 58 is closed,
The control unit 50 turns on the gate control type semiconductor switch 55 to start the cleaning operation.

For example, when the user presses the temporary stop key during the washing operation, the control unit 50 shuts off the gate-controlled semiconductor switch 55 to stop the operation of the washing pump motor 141a. Simultaneously with or slightly later than that, a short time current is applied to the solenoid 42 via the solenoid drive unit 59,
unlock. The fact that the lock is released can be recognized by the detection signal from the microswitch 44. Since the opening / closing contact 582 of the relay 58 is opened when the lock is released, even if the switch 55 remains conductive due to a malfunction of the gate control type semiconductor switch 55, for example, the drive power to the cleaning pump motor 141a. Is cut off and operation stops. Only when the lock is released, the operation lever 31 can be returned to the latch release position. Therefore, the user rotates the operation lever 31 and further pulls out the washing cabinet 2 to the front. From the unlocking operation to the withdrawal of the cleaning cabinet 2, a two-step operation of rotating the operation lever 31 and withdrawing the cleaning cabinet 2 is required, so even if the user's motion is quick, Takes time. Therefore, at the time when the cleaning cabinet 2 is pulled out, the jet of water from the nozzle arm 13 is almost completely stopped, and the water does not splash outside the cabinet.

Next, a dishwasher which is an embodiment of the second invention (hereinafter referred to as "second embodiment") will be described with reference to the drawings. The dishwasher of this second embodiment is the same as the first one described above.
The dishwasher according to the embodiment is different from the lid opening / closing drive mechanism and the lock mechanism. FIG. 11 is a side sectional view of an essential part centering on the upper lid opening / closing drive mechanism in the dishwasher of the second embodiment,
12 is a front sectional view of the same, FIG. 13 is a top view of essential parts showing a latch and lock mechanism in the dishwasher of the second embodiment, and FIG. 14 is a side sectional view thereof. The constituent elements that are the same as or correspond to those of the first embodiment are assigned the same reference numerals and explanations thereof are omitted.

In the dishwasher of the second embodiment, instead of moving the upper lid up and down by operating the parallel link mechanism by pulling / releasing the wire rope in conjunction with the manual operation of the operating lever in the first embodiment, instead of moving the upper lid up and down. , The left and right parallel link mechanisms are coupled, and the coupling portion is pulled or loosened by the driving force of the torque motor to open and close the upper lid.

In the dishwasher of the second embodiment, the left and right actuating plates 20 pivotally attached to the links 6 constituting the parallel link mechanism are connected plate members 60 which are arranged under the bottom wall of the washing cabinet 2. Are connected by the connecting plate member 60.
A torque motor 64 pulls a wire rope 61 connected to approximately the center of the bottom of the motor through two pulleys 62 and 63. That is, here, these constituent elements function as the upper lid driving means.

That is, when the torque motor 64 is turned on and the wire rope 61 is pulled, the actuating plates 20 on both sides move rearward substantially horizontally via the connecting plate member 60 against the biasing force of the coil spring 21. As a result, as in the case of rotating the operating lever 31 to the latched position in the first embodiment, the action of the parallel link mechanism causes the upper lid 5 to be lowered substantially vertically, and the upper lid 5 to open the upper opening 3 of the washing cabinet 2. Stop at the position where it is closed. Before pulling out the washing cabinet 2, the torque motor 64 is turned off. Then, the wire rope 61 relaxes to release the pulling of the connecting plate member 60, so that the connecting plate member 6 is urged by the urging force of the coil spring 21.
0 moves to the front side, and along with this, the upper lid 5 rises almost vertically by the parallel link mechanism and separates from the cleaning cabinet 2.

As shown in FIGS. 13 and 14, the structure of the latch device 30 of the second embodiment is the same as that of the first embodiment,
The locking mechanism is completely different. That is, the upper lid reinforcing metal fitting 5a is fixed to the front edge of the upper lid 5, and the latch lever locking metal fitting 5b protruding forward at a predetermined position is fixed with a screw. An upper lid engaging piece 5c protruding upward is formed on the latch lever locking metal fitting 5b. As shown in FIG. 13, the mounting position of the latch lever locking metal fitting 5b is just to the side of the position where the engaging piece 331 of the latch lever 33 comes when the operation lever 31 is at the latch position.

When the upper lid 5 is lifted, the engaging piece 331 and the upper lid engaging piece 5c do not come into contact with each other, and when the operating lever 31 is in the latched position, the engaging piece 331.
The upper lid 5 can be lowered without the upper lid engaging piece 5c coming into contact with each other. Then, as shown in FIG. 14, when the upper lid 5 is lowered and the water-sealing gasket 5d is in contact with the upper edge portion of the washing cabinet 2, the operation lever 31 should be rotated from the latch position to the latch release position. In this case, the engagement piece 331 comes into contact with the upper lid engagement piece 5c and the movement of the operation lever 31 is blocked. That is, in the second embodiment, as described above, the torque motor 6 is accommodated in the state where the cleaning cabinet 2 is housed in the housing 1 and the operation lever 31 is rotated to the latch position.
When the upper lid 5 is lowered by the operation of 4, the lock is applied accordingly. Further, when it is desired to pull out the washing cabinet 2, first, as described above, when the torque motor 64 is turned off and the upper lid 5 is raised, the lock is released accordingly,
The latch can be released by rotating the operation lever 31. Therefore, here, the engagement piece 331 functions as the first engagement portion, and the upper lid engagement piece 5c functions as the second engagement portion.

Also in the dishwasher of the second embodiment, a lock detection switch (actually the same is detected even when the upper lid 5 is completely closed) is provided at an appropriate position as in the first embodiment. The power supply line to the washing pump motor can be turned on or off depending on whether the switch is opened or closed. As a result, it is possible to reliably prevent water from splashing around when the cleaning cabinet 2 is pulled out forward.

Further, it is apparent that the above embodiments are merely examples of the first and second inventions and that appropriate changes and modifications can be made within the scope of the invention.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of a dishwasher according to an embodiment (first embodiment) of the first invention in a state where a washing cabinet is housed in a housing.

FIG. 2 is a schematic side sectional view showing a moving state when the washing cabinet is pulled out from the housing in the dishwasher of the first embodiment.

FIG. 3 is a side view of the main part of the dishwasher of the first embodiment, centering on the opening / closing drive mechanism of the upper lid in the state where the washing cabinet is housed in the housing.

FIG. 4 is a side view of the main part of the dishwasher of the first embodiment, centering on the opening / closing drive mechanism of the upper lid when the washing cabinet is pulled out from the housing.

FIG. 5 is a front view of the main part centering on the opening / closing drive mechanism of the upper lid in the dishwasher of the first embodiment.

FIG. 6 is a top view of essential parts showing a latch mechanism in the dishwasher of the first embodiment.

FIG. 7 is a top view of essential parts showing a latch mechanism in the dishwasher of the first embodiment.

FIG. 8 is a side sectional view of an essential part showing a latch mechanism in the dishwasher of the first embodiment.

FIG. 9 is a top view of the essential parts showing the lock mechanism in the dishwasher of the first embodiment.

FIG. 10 is a configuration diagram of a control system of a main part of the dishwasher according to the first embodiment.

FIG. 11 is a side view of the main part centering on the opening / closing drive mechanism of the upper lid in the state in which the washing cabinet is housed in the housing in the dishwasher according to one embodiment (second embodiment) of the second invention.

FIG. 12 is a front view of the main part centering on the opening / closing drive mechanism of the upper lid in the dishwasher of the second embodiment.

FIG. 13 is a top view of essential parts showing a latch and a lock mechanism in the dishwasher of the second embodiment.

FIG. 14 is a side sectional view of essential parts showing a latch and a lock mechanism in the dishwasher of the second embodiment.

[Explanation of symbols]

1 ... Case 1a ... Front frame 1b ... pin 1c ... Latch hole 1d ... edge 1e ... Side wall 2 ... Washing room 2a ... Front wall 2b ... upper edge 2c, 2e ... Opening 2d ... Standing wall 3 ... Top opening 5 ... Top lid 5a ... Upper lid reinforcing metal fitting 5b ... Latch lever locking metal fitting 5c ... Top lid engaging piece 6 ... Link 7 ... Front panel 8 ... Guide rail 9 ... Handle 14 ... Washing and drainage pump 141 ... Pump motor 141a ... Washing pump motor 141b ... Drainage pump motor 20 ... Operating plate 23 ... Wire rope 24 ... tube 25 ... Guide groove 26 ... Mounting member 30 ... Latch device 31 ... Operating lever 311 ... Fixed shaft 312 ... hanging piece 314 ... Stretched piece 32 ... Mounting plate 321 ... Axis 322 ... Fixed piece 33 ... Latch lever 331 ... Engaging piece 34 ... Hinge lever 341 ... Axis 342 ... abutting piece 343 ... Locking piece 40 ... Locking device 41 ... Case 42 ... Solenoid 43 ... Drive mechanism 44 ... Micro switch 50 ... Control unit 51 ... Commercial AC power supply 55 ... Gate-controlled semiconductor switch 57 ... Relay drive unit 58 ... Relay 581 ... Solenoid 582 ... Switching contact 60 ... Connecting plate member 61 ... Wire rope 62, 63 ... pulley 64 ... Torque motor

Continued front page    (72) Inventor Hideyuki Arai             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Tomoya Kawaguchi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F term (reference) 3B082 BB01 BB06 DC06

Claims (7)

[Claims] 1. A washing cabinet capable of accommodating dishware inside is provided in the housing, and the dishware is accommodated in the washing cabinet with an opening provided in the washing cabinet opened toward the outside of the housing. A dishwasher for washing by spraying water into the washing cabinet with the opening closed, a) locking means for prohibiting the opening of the washing cabinet when the opening is closed, and b) A pump motor for pumping water for the cleaning, and c) an opening / closing contact inserted in a power supply line to the motor, the opening / closing contact being interlocked with the operation of locking and unlocking by the locking means. A dishwasher comprising: an opening and closing control means for closing or opening the. 2. The locking means includes a1) an operating lever operated by a user, and movable engaging means that moves in association with the operation of the operating lever. Latch means for preventing the opening of the opening by engagement with an engagement portion provided on the housing side, and a2) The inhibition of opening of the opening by the latch means cannot be released by blocking the movement of the movable engaging means. 2. The dishwasher according to claim 1, wherein the opening / closing control means closes or opens the opening / closing contact in association with a locking and unlocking operation by the locking means. 3. The locking means includes a locking portion that moves between two positions to prevent movement of the movable engaging means, and the opening / closing control means is responsive to the position of the locking portion. The dishwasher according to claim 2, further comprising: a lock detection switch that is opened / closed by a switch, and a relay that opens / closes the open / close contact according to opening / closing of the switch. 4. A front surface of the housing is opened, the washing cabinet is capable of being pulled out forward from the housing, and has an opening for loading and unloading tableware on the upper surface thereof, and the washing cabinet An upper lid for closing an upper surface opening is provided, and the latch means stops the drawer of the washing cabinet by the engagement of the movable engaging means and the housing or an engaging portion provided on the housing side, and the lock is provided. The dishwasher according to claim 2 or 3, wherein the means prevents the movement of the movable engaging means from canceling the operation of stopping the drawer of the washing cabinet by the latch means. 5. A housing having a front opening, a washing cabinet that can be pulled out forward from the housing and has an opening for storing and taking out dishes on the upper surface, and a vertically movable body provided in the housing. A dishwasher comprising: an upper lid that closes an upper surface opening of the washing cabinet in a lowered position; and an upper lid driving unit that moves the upper lid up and down, wherein the washing cabinet has a first engaging portion and the upper lid has a second engaging portion. A portion is provided, the first engaging portion and the second engaging portion do not interfere with each other when the upper lid is in the raised position, the washing cabinet is housed in the housing, and the upper lid driving means lowers the upper lid. A dishwasher, characterized in that when it is lowered to a position, it is locked by the engagement of the first engaging part and the second engaging part so as to prevent the withdrawal of the washing cabinet. 6. The washing chamber comprises a latching means including an operating lever operated by a user and a movable engaging means that moves in association with the operation of the operating lever. Withdrawing of the washing cabinet is stopped by engagement with the housing or an engaging portion provided on the housing side, and at least a part of the latch means is the first engaging portion, The dishwasher according to claim 5, wherein movement of the movable engaging means is blocked by engagement with two engaging portions. 7. The dishwasher according to claim 5, wherein the upper lid driving means moves the upper lid up and down by a driving force of a motor.